Struct i_slint_core::items::ItemVTable

source · 
#[repr(C)]
pub struct ItemVTable {
    pub init: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, window_adapter: &WindowAdapterRc),
    pub geometry: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>) -> LogicalRect,
    pub cached_rendering_data_offset: usize,
    pub layout_info: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, orientation: Orientation, window_adapter: &WindowAdapterRc) -> LayoutInfo,
    pub input_event_filter_before_children: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventFilterResult,
    pub input_event: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventResult,
    pub focus_event: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: &FocusEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> FocusEventResult,
    pub key_event: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: &KeyEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> KeyEventResult,
    pub render: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, backend: &mut &'_ mut dyn ItemRenderer, self_rc: &ItemRc) -> RenderingResult,
}
Expand description

Items are the nodes in the render tree.

Fields§

§init: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, window_adapter: &WindowAdapterRc)

This function is called by the run-time after the memory for the item has been allocated and initialized. It will be called before any user specified bindings are set.

§geometry: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>) -> LogicalRect

Returns the geometry of this item (relative to its parent item)

§cached_rendering_data_offset: usize

offset in bytes from the *const ItemImpl. isize::MAX means None

§layout_info: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, orientation: Orientation, window_adapter: &WindowAdapterRc) -> LayoutInfo

We would need max/min/preferred size, and all layout info

§input_event_filter_before_children: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventFilterResult

Event handler for mouse and touch event. This function is called before being called on children. Then, depending on the return value, it is called for the children, and their children, then Self::input_event is called on the children, and finally Self::input_event is called on this item again.

§input_event: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventResult

Handle input event for mouse and touch event

§focus_event: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: &FocusEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> FocusEventResult§key_event: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, _: &KeyEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> KeyEventResult§render: unsafe extern "C" fn(_: Pin<VRef<'_, ItemVTable>>, backend: &mut &'_ mut dyn ItemRenderer, self_rc: &ItemRc) -> RenderingResult

Implementations§

Create a vtable suitable for a given type implementing the trait.

Trait Implementations§

Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
source§

impl HasStaticVTable<ItemVTable> for Text

Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
Safety: must be a valid VTable for Self
That’s the VTable itself (so most likely Self)
That’s the trait object that implements the functions Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.